A new [(1R,2R)-1,2-diaminocyclohexane]platinum(II) complex: formation by nitrate-acetonitrile ligand exchange

The title compound, cis-diacetonitrile[(1R,2R)-1,2-diaminocyclohexane-kappa 2 N,N']platinum(II) dinitrate monohydrate, [Pt(C(2)H(3)N)(2)(C(6)H(14)N(2))](NO(3))(2)center dot H(2)O, is a molecular salt of the diaminocyclohexane-Pt complex cation. There are two formula units in the asymmetric unit. Apart from the two charge-balancing nitrate anions, one neutral molecule of water is present. The components interact via N-H...O and O-H...O hydrogen bonds, resulting in supramolecular chains. The title compound crystallizes only from acetonitrile with residual water, with the acetonitrile coordinating to the molecule of cis-[Pt(NO(3))(2)(DACH)] (DACH is 1,2-diaminocyclohexane) and the water forming a monohydrate.